OPERATIONAL PERFORMANCE TEST / Wheel Loader Test SERVICE BRAKE FANCTION CHECK Summary: 1. The overall performance of the service brake is judged. 2. The braking capability of the brake is an item of safety control. Be sure to conduct the perform- ance test. Preparation: 1. Adjust air pressure of the tires evenly in advance. Air pressure: EU: 330 kPa (3.37 kgf/cm 2 , 48 psi) General: 425 kPa (4.34 kgf/cm 2 , 62 psi) 2. On a paved dry road, prepare a 100 m (328 ft) straight travel course (a 50 m (164 ft) of runway and a 50 m (164 ft) of measurement road), and set the brake starting point. 3. Empty the bucket, and hold the lift arm afloat 0.4 to 0.5 m (1 ft 4 in to 1 ft 8 in) above the ground.
4. Keep the hydraulic oil temperature at 50 ± 5 ° C (122 ± 41 ° F). Warm the axle oil satisfactorily by repeating travel and brake operations. Make a warm up operation so that the indicators of the engine water temperature monitor and the torque converter oil temperature monitor rise above the horizontal positions. Measurement Evaluation: Refer to the Performance Standard Table in Group T4-2. Remedy: Refer to the Trouble Shooting in Section T5. 0.4 to 0.5 m (1’4” to 1’8”) Stopping Distance Stopping Point Brake Starting Point T4GB-04-04-002 CAUTION: Avoid measurement at reverse for fear of dangers involved. (Forward-reverse lever: F) 1. Make measurement for high-speed mode. 2.
Select the switches as follows. 3. Put the forward-reverse lever at the F (Forward) position. From the runway, travel at 20 km/h (12 mph) by depression the accelerator pedal to the stroke end. 4. Depression the brake at the brake starting point, and completely stop the vehicle. (Right Service Brake Pedal) 5. Measure the distance from the brake starting point to the point where the front tire is contacting. 6. Make measurement three times, and determine the measurement value by obtaining their mean values. T4-4-2 Shift Switch Parking Brake Switch Accelerator Pedal Travel Mode Switch Work Mode Switch Clutch Cut Position Switch Speed 4 OFF Full depres- sion H N OFF